Tray for disc drive

1. A disc drive comprising: a tray of the disc drive comprising: a first disc receiving region for receiving a first disc; a second disc receiving region for receiving a second disc having a diameter larger than the first disc; a plurality of hooks arranged around the second disc receiving region, for maintaining the second disc loaded in the second disc receiving region; a plurality of molding portions spatially corresponding to the plurality of hooks and configured to facilitate formation of the hooks by a molding process and configured to be substantially impermeable to airflow caused by rotation of the loaded second disc, wherein each of the molding portions comprises a recess formed in the second disc receiving region.

2. The disc drive according to claim 1 , wherein the recess is formed in the molding process.

3. A disc drive comprising: a tray defining a first space and a second space concentric with the first space for respectively accommodating a first disc and a second disc with a diameter larger than said first disc and movable between a first position thereof where said tray stays inside said disc drive and a second position thereof where said tray exposes said first space and said second space to an outside of said disc drive so that said first disc and said second disc are capable of being placed in said first space and said second space respectively and removable therefrom, a region defined in said tray beside said second space and partially surrounding said second space together with a sidewall of said tray defined beside said second space; and at least one retainer integrally and protrusively extending from said sidewall into said second space and spaced from said region and said first space, said at least one retainer fixedly staying in said second space to abut against said second disc for retaining said second disc between said region and said at least one retainer when said second disc is loaded in said second space, said at least one retainer projectively defining a portion on said region along a perpendicular direction to said region, and said projective portion of said region spatially communicable exclusively with said second space of said tray and configured to be substantially impermeable to airflow caused by rotation of the loaded second disc, wherein said projective portion of said region is a recess integrally formed together with said region in a molding process of said tray and spatially communicable exclusively with said second space of said tray.